Nintendo's next console, the Wii U, will run into the same problem its predecessors did.…
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But one insider who has had access to the machine says that the console's impressive AMD Radeon-based graphics chip is off-set by a CPU that runs at low speeds, can do out-of-order processing but has fewer threads than the 360.

Also worth noting: just last week, one of the developers behind Metro: Last Light said the Wii U has a "horrible, slow CPU." Martin's discoveries seem to match that theory, as well as Digital Foundry's thoughts on how Mass Effect 3 runs on the three different consoles.